The architecture of 6-band HDTV camera system, which is newly developed for accurate color reproduction of motion picture based on spectral information is presented. The 6band HDTV camera is constructed by an optical system connecting the objective lens and two sets of conventional HDTV cameras whose spectral sensitivities are modified differently by interference filters inserted between the optical system and each camera. We evaluated the accuracy of the color estimations achieved by the 6-band and a conventional RGB (i.e. 3-band) HDTV camera. The evaluations are conducted using simulated camera signals and those obtained by experimental measurements. It is confirmed that the 6-band camera achieves the accurate color estimation for the use in extensive applications. In the experimental evaluation the average color difference of dEab obtained from the 6-band camera signals and the RGB camera signals became 1.43 and 4.12 respectively.